package marksys.free.com.marksys.ui.face;

import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.widget.Button;
import android.widget.Toast;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.util.Collections;

import marksys.free.com.marksys.R;
import marksys.free.com.marksys.repo.FaceRepo;
import marksys.free.com.marksys.ui.face.facebykomlinplus.CameraInterface;
import marksys.free.com.marksys.ui.face.facebykomlinplus.FaceSurfaceView;
import marksys.free.com.marksys.ui.face.facebykomlinplus.callback.RequsetFaceSearchCallBack;

import static marksys.free.com.marksys.ui.face.CameraPreviewActivity.getPicFromBytes;
import static marksys.free.com.marksys.utils.BitmapUtils.compressImage;

public class CameraPreviewPlusActivity extends AppCompatActivity {

    FaceRepo mFaceRepo = FaceRepo.newInstance();
    FaceSurfaceView faceSurfaceView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_camerapreview_plus);
        faceSurfaceView = findViewById(R.id.faceSurfaceView);
        Button changeBtn = findViewById(R.id.changeBtn);
        initCall();
        changeBtn.setOnClickListener(v -> {
            if (CameraInterface.getInstance().getCameraId() == 1) {
                CameraInterface.getInstance().setCameraId(0);
            } else if (CameraInterface.getInstance().getCameraId() == 0) {
                CameraInterface.getInstance().setCameraId(1);
            }
            initCall();
        });
    }

    private void initCall() {
        faceSurfaceView.setFaceDetectionCallBack((byte[] data, RequsetFaceSearchCallBack callBack) -> {
            Handler handler = new Handler();
            handler.postDelayed(() -> {
                Bitmap picFromBytes = getPicFromBytes(data, null);
                Bitmap bitmap = comp(picFromBytes);
                mFaceRepo.searchFaceStudent(Collections.singletonList(bitmap)).observe(CameraPreviewPlusActivity.this, resource -> {
                    assert resource != null;
                    switch (resource.status) {
                        case SUCCESS:
                            Intent resultIntent = new Intent();
                            assert resource.data != null;
                            resultIntent.putExtra("className", resource.data.className);
                            resultIntent.putExtra("stuName", resource.data.userName);
                            setResult(RESULT_OK, resultIntent);
                            finish();
                            break;
                        case LOADING:
                            break;
                        case ERROR:
                            //ShowErrTool.show(resource.errorCode, this, resource.errorMessage);
                            Toast.makeText(CameraPreviewPlusActivity.this, resource.errorMessage, Toast.LENGTH_SHORT).show();
                            callBack.call();
                            break;
                        default:
                            callBack.call();
                            break;
                    }
                });
            }, 3000);//0.1秒后执行Runnable中的run方法
        });
    }

    private Bitmap comp(Bitmap image) {

        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        image.compress(Bitmap.CompressFormat.JPEG, 100, baos);
        if (baos.toByteArray().length / 1024 > 1024) {//判断如果图片大于1M,进行压缩避免在生成图片（BitmapFactory.decodeStream）时溢出
            baos.reset();//重置baos即清空baos
            image.compress(Bitmap.CompressFormat.JPEG, 50, baos);//这里压缩50%，把压缩后的数据存放到baos中
        }
        ByteArrayInputStream isBm = new ByteArrayInputStream(baos.toByteArray());
        BitmapFactory.Options newOpts = new BitmapFactory.Options();
        //开始读入图片，此时把options.inJustDecodeBounds 设回true了
        newOpts.inJustDecodeBounds = true;
        Bitmap bitmap = BitmapFactory.decodeStream(isBm, null, newOpts);
        newOpts.inJustDecodeBounds = false;
        int w = newOpts.outWidth;
        int h = newOpts.outHeight;
        //现在主流手机比较多是800*480分辨率，所以高和宽我们设置为
        float hh = 800f;//这里设置高度为800f
        float ww = 480f;//这里设置宽度为480f
        //缩放比。由于是固定比例缩放，只用高或者宽其中一个数据进行计算即可
        int be = 1;//be=1表示不缩放
        if (w > h && w > ww) {//如果宽度大的话根据宽度固定大小缩放
            be = (int) (newOpts.outWidth / ww);
        } else if (w < h && h > hh) {//如果高度高的话根据宽度固定大小缩放
            be = (int) (newOpts.outHeight / hh);
        }
        if (be <= 0) {
            be = 1;
        }
        newOpts.inSampleSize = be;//设置缩放比例
        //重新读入图片，注意此时已经把options.inJustDecodeBounds 设回false了
        isBm = new ByteArrayInputStream(baos.toByteArray());
        bitmap = BitmapFactory.decodeStream(isBm, null, newOpts);
        return compressImage(bitmap);//压缩好比例大小后再进行质量压缩
    }
}
